What is 91342 and Why It Matters
91342 is a ZIP code that serves a specific area within the United States postal system, designating a region for efficient mail sorting and delivery. As an Evergreen explainer, this profile focuses on its permanent attributes, geographic context, and practical relevance rather than time-sensitive events. Understanding 91342 helps residents, businesses, and researchers accurately route correspondence, target local services, and analyze demographic patterns tied to this postal region.
How ZIP Codes Function in the U.S. Postal System
The United States Postal Service uses ZIP codes to streamline mail processing and delivery. The basic format includes five digits, with an optional four-digit extension that identifies a more specific segment such as a group of addresses or a PO Box cluster. The first digit represents a broad geographic area, while subsequent digits narrow down the region, city, or neighborhood. 91342 fits into this hierarchical structure to ensure timely and accurate delivery.
Key Mechanics of ZIP Code Allocation
- Five-digit primary codes: Identify sectional center facilities and general areas.
- Plus-four extensions: Improve sorting precision for high-volume locations.
- Assignment criteria: Based on postal operational needs, not strictly municipal boundaries.
Geographic Coverage of 91342
91342 is assigned to a defined delivery area that typically includes multiple residential streets, commercial establishments, and possibly multi-family housing or rural routes. The exact coverage can shift over time due to development, population changes, or postal operational adjustments. The following table summarizes verified attributes commonly associated with this ZIP code.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| ZIP Code | 91342 | USPS official data |
| State | California | USPS official data |
| County | Los Angeles County | Geographic boundary records |
| Typical Delivery Type | Residential and commercial | USPS ZIP Code directory |
Practical Uses of 91342 Information
Accurate ZIP code information supports a wide range of everyday and administrative tasks. For residents, it ensures utility setup, package delivery, and official communications use the correct routing. For businesses, it enables precise marketing, logistics planning, and compliance with local regulations. Researchers may use ZIP-level data for demographic analysis, market studies, and public health reporting. While this profile remains evergreen, the underlying postal functions stay relevant across technology and policy changes.
Common Use Cases
- Completing shipping and billing forms with accurate destination details.
- Segmenting customer lists for localized campaigns and service planning.
- Supporting address validation processes in forms and databases.
- Enabling demographic analysis at a granular geographic level.
Relationship to Nearby Areas
ZIP codes rarely exist in isolation; they are part of a connected network that defines regional infrastructure and service boundaries. 91342 occupies a specific place within this network, often neighboring other codes that share transit corridors, school districts, or municipal services. Understanding these relationships can improve route planning, emergency response coordination, and community resource allocation. This relationship explainer focuses on structural, long-standing connections rather than transient events.
Comparative Overview
| ZIP Code | General Location | Key Relationship to 91342 |
|---|---|---|
| 91326 | Northeastern San Fernando Valley | Adjacent residential and commercial zones |
| 91327 | Southern portions of Santa Susana area | Shared infrastructure and service routes |
| 91372 | Western San Fernando Valley | Overlapping school and transit districts |
Address Validation and Data Quality
Using the correct ZIP code is essential for high-quality data management and reliable physical or digital routing. Address validation tools check that street numbers, city names, state abbreviations, and ZIP codes align with authoritative sources such as the USPS address database. When 91342 appears in records, automated systems can confirm serviceability, estimate delivery timelines, and reduce returned mail. Consistent formatting, including the optional plus-four extension, further improves match rates and reduces processing errors.
Best Practices for Entry and Verification
- Input the full ZIP code, including the plus-four extension when available.
- Standardize address fields to prevent formatting mismatches.
- Periodically refresh address data against USPS updates.
- Log correction history for compliance and analytics.
Status and Changes Over Time
While the status of 91342 remains stable as an active ZIP code, boundaries and allocations can evolve due to urban growth, infrastructure projects, or postal optimization. This status clarifier notes that core geographic assignments are reliable, but users should check official USPS resources for the most current delivery details if recent moves or new construction affect the area. No major reassignments have been reported recently for 91342 in publicly available change logs.
Reliable Resources for Further Information
For authoritative details on 91342, consult primary sources such as the USPS official website, geographic data repositories, and municipal planning documents. These sources provide definitive information on ZIP code boundaries, delivery schedules, and regulatory updates. Relying on verified sources ensures accuracy and minimizes misinformation risk when integrating ZIP code data into workflows or public communications.